Boiler.



No 702,694'. Patented 1u-ne '17, y1902.

- H BERGFLETH.

BOILEB. (Application md Mar. 1o, 1902.) (No Model.)

UNITED STATES" PATENT OFFICE.

.HENRY B ERGFILETH, oF NEW YORK, N. Y.

' BOILER.

SPECIFICATION form'ing'part'of Letters Patent No. 702,694, dated rune 17, 1902.

Application heimat 1o, 1902.

' a more perfect combustion-of the fuel anda higher heat, producing thus more steam in av shorter time with a'given quantity of fuel.

Itis well known that obnoxious clinkers are forming in all fire-pots during the combustion of the coal. lThese clinkers are a determent to the fire, they entail a loss, and haveto be removed by the operator..

It is the special object of my'invention to utilize the clinkers'during the continuance of the re to the greatest advantage.- -The clinkers are used up untilfthey 'practically form ashes.

The invention is illustratedin theaccompanying drawings,in .which-V Y Figure l represents in longitudinal section on plane of line l l'of Figa2 the boiler and furnace embodying my invention; and Fig. 2 illustrates same infront view,- partly broken away. I

Similar letters of reference denote like parts in all the figures.

In the drawings, A represents the boiler.

B is the flue for the flame-gases, and F represents the grate-bars. Below the grate there is provided an ironv pan C, which is located right beneath same. The pan C is rectangular on its rear inside portion c2, while the front -portion forms a mouth c8 under an obtuse off pipe c issues into a waste-pipe E, which conducts the water away. The pan C also serves as the ash-pan.

By means of the open lpassing the clinkers and coal.

Serial No. 97,401. (No model.)

by and by water-vapor evolved. The draft created will carry thewater-vapor up through the clink'ers'and coal," where the water-vapors are decomposed by the incandescent elinkers and coal, forming oxygenand nitrogen, of

vwhich the first entertains combustion, while the latter is a combustible gas in itself. Of course 4the air drawn into the furnace passes the surface of the water and takes watervapors along. It is charged with some water-vapor, and thus increases the effect when In this mannerQthe combustion of the coal is greatly augmented and the clinkers are lgradually used up until they practically are used up, leaving nothing but ashes. By this I attain a complete combustion of the coal and clinkers,

producing thus a higher heat in a shorter` time Ywith a given quantity of fuel, and thereby I generate more steam in a given time withv a given quantity of coal.

Thepan C rests on supports h, which may be arranged lower or higher, so that any convenient size of pan may be used.

A small cover c' is provided in the top portion of the obtusely-angular part c4, covering the flow-olf pipe c. This cover c is let down on the top opening of the pipe c when itis desired to remove the ashes from the' panC. The cover c may also be let down when the coal and clinkers are really incandescent, so that the pan yC may be vfilled higher up with water, whereby the surface of the latter comes nearer to the grate andglowingffuel, causing thus an increased evaporation rand a more vivid combustion of the coal and elinkers, and thereby an increased production of steam.

The grate-bars are substantially far apart, so that most of the ashes fall through by itself, and little raking of the fire is necessary.

IOO

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. A boiler and furnace with grate-bars substantially far apart in combination with a Water-pan located right beneath the grate-bars and having a rectangular rear portion, an obtusely-angular front portion forming a mouth extending beyond the furnace-door and boiler- Wall, a HOW-off pipe in the top portion of the obtusely-angular front part, a cover adapted to close the flow-off pipe, a Waste-pipe, and a Water pipe With Water supply regulating valve.

2. In an improved boiler and furnace grate bars substantially far apart, a Water-pan located right beneath the grate-bars having a rectangular rear portion, an obtusely-angular front portion'forming a mouth which extends beyond the furnace-door and boiler- Wall, a Herv-off pipe in the top portion of thc;

HENRY BERGFLETH.

Witnesses:

LUDWIG K. Bol-1M, JAMES J. AsTARI'ro. 

